反应详情

温度

140 °C

4-Methoxy-3-nitropyridine (8.17 g, 53.0 mmol) was transferred to a bomb in EtOH (5-10 mL). To this was added a solution of methylamine in EtOH (26.4 mL, 8.03M, 0.212 mol). The bomb was sealed and lowered into an oil bath at 120° C. The bath temperature fell to 90° C. and remained that way for 2 hours. The temperature was raised to 140° C. over 0.5 hour and held there 0.5 hour. The contents were transferred to a flask with EtOH (not very soluble) and the solvent was evaporated. Flash chromatography on silica gel with a gradient of CH2Cl2 /CH3OH gave 7.17 g (88%) of 4-methylamino-3-nitropyridine as a yellow solid: mp 155°-158° C.

1. customThe bomb was sealed
2. customlowered into an oil bath at 120° C
3. customfell to 90° C.
4. customfor 2 hours
5. custom(not very soluble) and the solvent was evaporated